Create Chocolatey package

[CharliePoole]

The 1.0 release will add a chocolatey package to the existing zip. There really is no need for a standard nuget package since the project editor is a tool, which should be installed once per machine. This is a good place for us to start creating our own chocolatey packages, since it consists of a single exe and has no dependencies.

Since I'm doing this myself, there is no need for the usual indirection to a download site. The package will be in the form of a "local" package, which actually embeds the project editor exe file.

@ferventcoder Your comments would be appreciated as this progresses.
@nunit/gui-team @nunit/core-team You guys too, of course. 😄